Use of a New Insertion Apparatus for Improving Performances of the Friction Rock Stabilizers

Komurlu, Eren; Çelik, Atila Gürhan; Güneş, İbrahim

doi:10.1007/s42461-021-00533-5

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…It was determined that it is advantageous to use polyamide materials together with steel nuts for having high energy absorption capacities instead of using them alone as a nut material. In rock masses with various problems like clay swelling, rock squeezing and rock bursting, the use of rock bolts with high energy absorption capacity has a critical importance [36][37][38]. Therefore, the extra costs of polyamide nuts should not seem unnecessary.…”

Section: Discussionmentioning

confidence: 99%

Investigation of New Energy Absorbing Mechanisms Used to Fix Rock Bolt Plates

Komurlu

2023

Period. Polytech. Civil Eng.

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In this study, different plate fixing designs were tested in order to improve rock bolting performances. Instead of commonly used steel nuts, different plate fixing designs were investigated by both laboratory and site studies. In addition, the usability of nuts and energy absorbers made of the polyamide type engineering polymer was investigated to assess whether they are advantageous for the aim of supplying high-energy absorbing features. In this experimental study, deformation-controlled load tests were carried out to evaluate the bearing and energy absorption capacities of totally eight different groups of specimens. According to the findings from this study, use of the polyamide material with steel nuts as an energy absorber material, rather than using instead of steel nuts supplies good results. As another outcome, it has been determined that use of proper washers between steel nuts and polyamide absorbers can significantly improve the energy absorption performances. It has been evaluated that the energy absorption capacity of the bolt plates can be economically increased up to 10 times by using suitable polyamide energy absorbers placed between the plate and steel nut parts. It was concluded that the polyamides can be used to remarkably improve the rock bolting performances especially in the rock masses where the high energy absorption capacity property is needed, like those with rock bursting, squeezing and swelling problems.

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Section: Discussionmentioning

confidence: 99%

Investigation of New Energy Absorbing Mechanisms Used to Fix Rock Bolt Plates

Komurlu

2023

Period. Polytech. Civil Eng.

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“…), pre-tensioning properties (active, passive), energy absorption capacities (energy-absorbing bolts and others) and etc. (Li et al, 2014;Wang et al, 2019;Ranjbarnia et al, 2016;Komurlu, 2021a). The widespread use of rock bolts has led to the understanding of modern tunnel support strategies in 20th century.…”

Section: Introductionmentioning

confidence: 99%

A Resin Type Additive Use to Improve Load Bearing Capacities of Grouted Rock Bolts Exposed to Thermal Cycles

Komurlu

2023

Mühendislik Bilimleri Ve Tasarım Dergisi

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A thermoset PMS (Polyvinyl modified silicone) type polymer additive effect on load bearing capacities of cement grouted rock bolt specimens exposed to thermal cycles was investigated with a series of experimental studies. The additive used in this study was in liquid phase while adding into the fresh cement mix and started to solidify by polymerization after being mixed well in the cement grout. The silicone based thermoset product was selected to use because of its ability of polymerization in contact with water. According to the results of this study, the load bearing capacity loss due to thermal cycles was found to be notably limited as a result of using the thermoset additive. Therefore, the additive tested in this study was assessed to improve resistivities of the cement grouted rock bolts against the thermal changes.

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Use of a New Insertion Apparatus for Improving Performances of the Friction Rock Stabilizers

Cited by 2 publications

References 26 publications

Investigation of New Energy Absorbing Mechanisms Used to Fix Rock Bolt Plates

Investigation of New Energy Absorbing Mechanisms Used to Fix Rock Bolt Plates

A Resin Type Additive Use to Improve Load Bearing Capacities of Grouted Rock Bolts Exposed to Thermal Cycles

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